全球CO_(2)升高背景下UV-B对黄芩产量和品质的影响  

Effects of different doses of UV-B on the yield and quality of Scutellaria baicalensis under elevated CO_(2)

作　　者：陈怡平[1] 贾凤安[1] 宋双红[2] 王喆之[2] 

机构地区：[1]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,西安710075 [2]陕西师范大学西北濒危药材资源开发国家工程实验室,西安710062

出　　处：《地球环境学报》2011年第6期659-663,共5页Journal of Earth Environment

基　　金：西部之光项目(2007YB04)

摘　　要：以黄芩为实验材料,研究了CO_(2)浓度升高背景下不同剂量UV-B对黄芩叶片丙二醛(MDA)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)以及黄芩根产量和品质的影响。结果表明:(1)正常CO_(2)浓度和CO_2浓度升高条件下,MDA浓度、SOD和CAT活性都随着UV-B剂量的增加而增加。低剂量UV-B条件下,CO_(2)浓度升高降低了SOD和CAT活性,MDA浓度没有显著变化;高剂量UV-B条件下,CO_(2)浓度升高导致SOD和CAT活性升高,引起MDA浓度显著升高。(2)低剂量UV-B辐射有利于提高黄芩产量和黄芩苷含量,最佳剂量为2.33 KJ·m^(-2)·d^(-1)。无紫外线辐射条件CO_2升高增加黄芩产量,但降低黄芩品质。因此,在黄芩栽培过程补充2.33 KJ·m^(-2)·d^(-1)的UV-B辐射有利于遏制CO_2升高导致中药材品质降低问题。To determine the effects of different doses of UV-B on the yield and quality of ScuteUaria baicalensis under elevated CO_(2), the S. baicalensis seedlings of 60-d-old were exposed to elevated CO_(2) for 60 days at different UV-B doses. The results indicated （ 1 ） the concentration of MDA, the SOD and CAT activities increased with increment of UV-B doses under ambient and elevated COE condition. At lower UV-B doses, elevated CO_(2) treatment resulted in decreasing in SOD and CAT activities, no significant change was observed in MDA concentration. But at higher UV-B doses, elevated CO_(2) treatment resulted in increasing in SOD and CAT activities; moreover, no MDA concentration was significant increased. （2） Lower UV-B doses radiation could improvement S. baicalensis yield and quality and the best dose was 2.33 KJ · m-2 · d-1. Although elevated CO_(2) lead to increase in yield of S. baicalensis, the quality was decreased. Therefore, UV-B of 2.33 KJ · m-2 · d-1 was applied in agriculture planting to hinder the elevated CO2 effect.

关 键 词：UV-B辐射 CO_(2)浓度升高 全球变暖 温室效应 黄芩 

分 类 号：S567.239[农业科学—中草药栽培]